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windows-nt/Source/XPSP1/NT/multimedia/media/mplayer2/fixreg.c

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2020-09-26 03:20:57 -05:00
/*-----------------------------------------------------------------------------+
| FIXREG.C |
| |
| Publisher and Video For Windows make evil changes to the registry |
| when they are installed. Look for these changes. If they are spotted |
| then put up a message box to warn the user and offer the user the chance to |
| correct them (i.e. stuff our version back in) |
| |
| (C) Copyright Microsoft Corporation 1994. All rights reserved. |
| |
| Revision History |
| 10-Aug-1994 Lauriegr Created. |
| |
+-----------------------------------------------------------------------------*/
#include <windows.h>
#include "mplayer.h"
#include "fixreg.h"
#include "registry.h"
/* The idea is to call CheckRegValues(hinst) on a separate thread
(sort of backgroundy thing) and have it just die
quietly if there's no problem. If on the other hand there is a problem
then we need to get the message box up - and it's a VERY BAD IDEA to
try to put a message box up on anything other than the thread that's doing
all the UI (otherwise ScottLu will get you with a weasle word - guaranteed).
So the background thread should PostMessage (Post, don't Send - more weasles)
to the main thread a message to say "WM_BADREG". The main thread should then
wack up the dialog box by calling FixRegValues.
Suggested coding in main thread:
BackgroundRegCheck(hwndmain);
in window proc for hwndmain:
case WM_HEYUP:
// if ( IDOK == MessageBox(hwnd, text, appname, MB_OKCANCEL) )
if ( IDOK == ErrorResBox(hwnd, NULL, MB_OKCANCEL, IDS_APPNAME, IDS_BADREG) )
if (!SetRegValues())
Error(ghwndApp, IDS_FIXREGERROR);
*/
/* This is a reg setting to disable the check. */
extern SZCODE aszOptionsSection[];
static SZCODE aszIgnoreRegistryCheck[] = TEXT("Ignore Registry Check");
/* These are the things we check up.
First define them as static strings, since the compiler's not smart enough
to spot common strings.
NOTE - these values are NOT LOCALISED, except for the ones that are.
*/
#ifdef CHICAGO_PRODUCT
#define APPNAME TEXT("mplayer.exe")
#define WINDIR TEXT("%s\\") // To be replaced by Windows directory
LPTSTR pWindowsDirectory = NULL;
#else
#define APPNAME TEXT("mplay32.exe")
#define WINDIR
#endif
TCHAR szMPlayer[] = TEXT("MPlayer");
TCHAR szMPlayer_CLSID[] = TEXT("MPlayer\\CLSID");
TCHAR szMPOLE2GUID[] = TEXT("{00022601-0000-0000-C000-000000000046}");
TCHAR szMPCLSID_OLE1GUID[] = TEXT("CLSID\\{0003000E-0000-0000-C000-000000000046}");
TCHAR szMPStdExecute_Server[] = TEXT("MPlayer\\protocol\\StdExecute\\server");
TCHAR szAppName[] = WINDIR APPNAME;
TCHAR szMPShell_Open_Command[] = TEXT("MPlayer\\shell\\open\\command");
TCHAR szAppName_Play_Close[] = WINDIR APPNAME TEXT(" /play /close %1");
TCHAR szMPlayer_insertable[] = TEXT("MPlayer\\insertable");
TCHAR szEmpty[] = TEXT("");
TCHAR szMPStdFileEdit_Handler[] = TEXT("MPlayer\\protocol\\StdFileEditing\\handler");
#ifdef CHICAGO_PRODUCT
TCHAR szMCIOLE[] = WINDIR TEXT("mciole.dll");
#else
TCHAR szMCIOLE16[] = TEXT("mciole16.dll");
TCHAR szMPStdFileEdit_Hand32[] = TEXT("MPlayer\\protocol\\StdFileEditing\\handler32");
TCHAR szMCIOLE32[] = TEXT("mciole32.dll");
#endif
TCHAR szMPStdFileEdit_Package[] = TEXT("MPlayer\\protocol\\StdFileEditing\\PackageObjects");
TCHAR szMPStdFileEdit_Server[] = TEXT("MPlayer\\protocol\\StdFileEditing\\server");
TCHAR szMPStdFileEdit_verb_0[] = TEXT("MPlayer\\protocol\\StdFileEditing\\verb\\0");
TCHAR szMPStdFileEdit_verb_1[] = TEXT("MPlayer\\protocol\\StdFileEditing\\verb\\1");
/* That sleazebag Publisher setup even farts around with these new settings!!
*/
TCHAR szAVIStdFileEdit_Server[] = TEXT("AVIFile\\protocol\\StdFileEditing\\server");
TCHAR szMIDStdFileEdit_Server[] = TEXT("MIDFile\\protocol\\StdFileEditing\\server");
TCHAR szServerAVI[] = WINDIR APPNAME TEXT(" /avi");
TCHAR szServerMID[] = WINDIR APPNAME TEXT(" /mid");
/* The following ones DO need to be localised.
They will be loaded in CheckRegValues.
*/
#define RES_STR_LEN 40 /* Should be enough as a maximum resource string. */
TCHAR szMediaClip[RES_STR_LEN]; // IDS_CLASSROOT in resources
TCHAR sz_Play[RES_STR_LEN]; // IDS_PLAYVERB in resources
TCHAR sz_Edit[RES_STR_LEN]; // IDS_EDITVERB in resources
TCHAR szAviFile[] = TEXT("AVIFile");
TCHAR szMidFile[] = TEXT("MIDFile");
/* Array of registry value-data pairs to check:
*/
LPTSTR RegValues[] =
{
szMPlayer, szMediaClip,
szMPlayer_CLSID, szMPOLE2GUID,
szMPCLSID_OLE1GUID, szMediaClip,
szMPStdExecute_Server, szAppName,
szMPShell_Open_Command, szAppName_Play_Close,
szMPlayer_insertable, szEmpty,
#ifdef CHICAGO_PRODUCT
szMPStdFileEdit_Handler, szMCIOLE,
#else
szMPStdFileEdit_Handler, szMCIOLE16,
szMPStdFileEdit_Hand32, szMCIOLE32,
#endif
szMPStdFileEdit_Package, szEmpty,
szMPStdFileEdit_Server, szAppName,
szMPStdFileEdit_verb_0, sz_Play,
szMPStdFileEdit_verb_1, sz_Edit,
aszKeyAVI, szAviFile,
aszKeyMID, szMidFile,
aszKeyRMI, szMidFile,
szAVIStdFileEdit_Server, szServerAVI,
szMIDStdFileEdit_Server, szServerMID
};
#ifdef CHICAGO_PRODUCT
/* AllocWindowsDirectory
*
* Dynamically allocates a string containing the Windows directory.
* This may be freed using FreeStr().
*
*/
LPTSTR AllocWindowsDirectory()
{
UINT cchWinPath;
LPTSTR pWindowsDirectory = NULL;
cchWinPath = GetWindowsDirectory(NULL, 0);
if (cchWinPath > 0)
{
if (pWindowsDirectory = AllocMem(cchWinPath * sizeof(TCHAR)))
{
cchWinPath = GetWindowsDirectory(pWindowsDirectory, cchWinPath);
if (cchWinPath == 0)
{
/* Unlikely, but check anyway:
*/
DPF0("GetWindowsDiretory failed: Error %d\n", GetLastError());
*pWindowsDirectory = TEXT('\0');
}
}
}
return pWindowsDirectory;
}
#endif
/* Check that a REG_SZ value in the registry has the value that it should do
Return TRUE if it does, FALSE if it doesn't.
*/
BOOL CheckRegValue(HKEY RootKey, LPTSTR KeyName, LPTSTR ShouldBe)
{
DWORD Type;
TCHAR Data[100];
DWORD cData = sizeof(Data);
LONG lRet;
HKEY hkey;
if (ERROR_SUCCESS!=RegOpenKeyEx( RootKey
, KeyName
, 0 /* reserved */
, KEY_QUERY_VALUE
, &hkey
)
)
return FALSE; /* couldn't even open the key */
lRet=RegQueryValueEx( hkey
, NULL /* ValueName */
, NULL /* reserved */
, &Type
, (LPBYTE)Data
, &cData
);
RegCloseKey(hkey); /* no idea what to do if this fails */
if (ERROR_SUCCESS!=lRet) return FALSE; /* couldn't query it */
/* Data, cData and Type give the data, length and type */
if (Type!=REG_SZ) return FALSE;
lRet = lstrcmpi(Data,ShouldBe); /* capture lRet to make debug easier */
return 0==lRet;
} /* CheckRegValue */
/* check the registry for anything evil. Return TRUE if it's OK else FALSE */
BOOL CheckRegValues(void)
{
HKEY HCL = HKEY_CLASSES_ROOT; /* save typing! */
/* Now just check that the OLE2 class ID is correct
*/
if( !CheckRegValue( HCL, szMPlayer_CLSID, szMPOLE2GUID ) )
return FALSE;
/* Running the old MPlayer on Chicago also screws up the
* file-extension associations, so make sure they haven't changed:
*/
if( !CheckRegValue( HCL, aszKeyAVI, szAviFile ) )
return FALSE;
return TRUE;
} /* CheckRegValues */
/* start this thread to get the registry checked out.
hwnd is typed as a LPVOID because that's what CreateThread wants.
*/
DWORD WINAPI RegCheckThread(LPVOID hwnd)
{
if (!CheckRegValues())
PostMessage((HWND)hwnd, WM_BADREG, 0, 0);
return 0; /* end of thread! */
}
/* Call this with the hwnd that you want a WM_BADREG message posted to
It will check the registry. No news is good news.
It does the work on a separate thread, so this should return quickly.
*/
void BackgroundRegCheck(HWND hwnd)
{
HANDLE hThread;
DWORD thid;
hThread = CreateThread( NULL /* no special security */
, 0 /* default stack size */
, RegCheckThread
, (LPVOID)hwnd
, 0 /* start running at once */
, &thid
);
if (hThread!=NULL) CloseHandle(hThread); /* we don't need this any more */
/* Else we're in some sort of trouble - dunno what to do.
Can't think of an intelligible message to give to the user.
Too bad. Creep home quietly.
*/
} /* BackgroundRegCheck */
/* returns TRUE if it worked. Dunno what to do if it didn't
*/
BOOL SetRegValue(HKEY RootKey, LPTSTR KeyName, LPTSTR ValueName, LPTSTR ShouldBe)
{
HKEY hkey;
if (ERROR_SUCCESS!=RegOpenKeyEx( RootKey
, KeyName
, 0 /* reserved */
, KEY_SET_VALUE
, &hkey
)
) {
/* Maybe the key has been DELETED - we've seen that */
DWORD dwDisp;
if (ERROR_SUCCESS!=RegCreateKeyEx( RootKey
, KeyName
, 0 /* reserved */
, TEXT("") /* class */
, REG_OPTION_NON_VOLATILE
, KEY_SET_VALUE
, NULL /* SecurityAttributes */
, &hkey
, &dwDisp
)
) /* well we're really in trouble */
return FALSE;
else /* So now it exists, but we now have to open it */
if (ERROR_SUCCESS!=RegOpenKeyEx( RootKey
, KeyName
, 0 /* reserved */
, KEY_SET_VALUE
, &hkey
)
) /* Give up */
return FALSE;
}
if (ERROR_SUCCESS!=RegSetValueEx( hkey
, ValueName
, 0 /* reserved */
, REG_SZ
, (LPBYTE)ShouldBe
, (lstrlen(ShouldBe)+1)*sizeof(TCHAR) /* BYTES */
)
)
return FALSE; /* couldn't set it */
if ( ERROR_SUCCESS!=RegCloseKey(hkey) )
/* no idea what to do!*/ ; /* couldn't set it */
/* I'm NOT calling RegFlushKey. They'll get there eventually */
return TRUE;
} /* SetRegValue */
/* Update the registry with the correct values. Return TRUE if everything succeeds */
BOOL SetRegValues(void)
{
HKEY HCL = HKEY_CLASSES_ROOT; /* save typing! */
DWORD i;
#ifdef CHICAGO_PRODUCT
TCHAR Buffer[MAX_PATH+40];
#endif
if( !( LOADSTRING( IDS_CLASSROOT, szMediaClip )
&& LOADSTRING( IDS_PLAYVERB, sz_Play )
&& LOADSTRING( IDS_EDITVERB, sz_Edit ) ) )
/* If any of the strings fails to load, forget it:
*/
return TRUE;
#ifdef CHICAGO_PRODUCT
if (pWindowsDirectory == NULL)
{
if ((pWindowsDirectory = AllocWindowsDirectory()) == NULL)
return TRUE;
}
#endif
for( i = 0; i < ( sizeof RegValues / sizeof *RegValues ); i+=2 )
{
/* Do a check to see whether this one needs changing,
* to avoid gratuitous changes, and to avoid the slim chance
* that an unnecessary SetRegValue might fail:
*/
#ifdef CHICAGO_PRODUCT
/* Do substitution of Windows directory, if required.
* This simply copies the value to the buffer unchanged
* if it doesn't contain a replacement character.
*/
wsprintf(Buffer, RegValues[i+1], pWindowsDirectory);
if( !CheckRegValue( HCL, RegValues[i], Buffer ) )
#else
if( !CheckRegValue( HCL, RegValues[i], RegValues[i+1] ) )
#endif
{
#ifdef CHICAGO_PRODUCT
DPF("Fixing the registry: Value - %"DTS"; Data - %"DTS"\n", RegValues[i], Buffer);
if( !SetRegValue( HCL, RegValues[i], NULL, Buffer ) )
#else
DPF("Fixing the registry: Value - %"DTS"; Data - %"DTS"\n", RegValues[i], RegValues[i+1]);
if( !SetRegValue( HCL, RegValues[i], NULL, RegValues[i+1] ) )
#endif
return FALSE;
}
}
#ifdef CHICAGO_PRODUCT
FreeStr (pWindowsDirectory);
#endif
return TRUE;
} /* SetRegValues */
BOOL IgnoreRegCheck()
{
DWORD fIgnore = 0L;
ReadRegistryData(aszOptionsSection
, aszIgnoreRegistryCheck
, NULL
, (LPBYTE)&fIgnore
, sizeof fIgnore);
return (fIgnore != 0L);
} /* IgnoreRegCheck */

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